Blog
Srofia Blog
Plain, sourced guides from the studio behind SentryFi, Untilfree, Whyworld, Tap Cat and Zippy Robo. When we mention our own app, we say so, and we compare it fairly with the alternatives. Follow along with the RSS feed.
Latest articles
Public WiFiBest Public WiFi Security Apps for iPhone and Android (2026)Checkers, scanners and VPNs for airport, hotel and café WiFi, compared honestly: what each one does, what it costs in 2026, and when you need which.
TravelTravel WiFi Checklist (2026): What to Do Before You Connect at the Airport or HotelA one-page routine for airport and hotel WiFi: what to set up at home, what to check before you tap Join, and what to do after. With sources and links to 30 airports.
GamesBest Offline Games to Play on a Flight (iPhone and Android, 2026)Mobile games that play in airplane mode, from two-minute reflex games to 40-minute strategy runs. Prices, platforms and a pre-flight checklist so nothing fails at 35,000 feet.
World newsBest Apps to Understand World News and Trends (2026)Tools that explain the news, not just list it: Google Trends, Ground News, AllSides, Wikipedia’s Current events, Reuters, BBC and Whyworld, with prices and honest limits.
Financial independenceBest FIRE Calculator Apps in 2026: An Honest Comparison11 FIRE calculators and apps compared, including ProjectionLab, Boldin, Empower, FIRECalc and Untilfree: prices, Monte Carlo, taxes and bank links.- Money in timeHow Many Hours of Work Is It? What Things Really Cost in Your TimeTurn any price into hours of your working life, with take-home pay, worked examples for rent, an iPhone or a car, and a free calculator you can embed.
All guides (170)
Every English guide on srofia.com, grouped by topic. Guides in other languages: SentryFi Deutsch, 日本語 and more; Untilfree Deutsch, Français, Español. Country pages: what 40 countries are searching.
SentryFi · public WiFi
82 guides
- Public WiFi safety guides
- Is public WiFi safe?
- Is airport WiFi safe?
- Is JFK Airport WiFi safe?
- Is Heathrow Airport WiFi safe?
- Is DFW Airport WiFi safe?
- Is O’Hare Airport WiFi safe?
- Is Changi Airport WiFi safe?
- Is Frankfurt Airport WiFi safe?
- Is Sydney Airport WiFi safe?
- Is Haneda Airport WiFi safe?
- Is Narita Airport WiFi safe?
- Is Istanbul Airport WiFi safe?
- Is LAX Airport WiFi safe?
- Is SFO Airport WiFi safe?
- Is Boston Logan Airport WiFi safe?
- Is Newark Airport WiFi safe?
- Is Houston IAH Airport WiFi safe?
- Is Toronto Pearson Airport WiFi safe?
- Is Schiphol Airport WiFi safe?
- Is Munich Airport WiFi safe?
- Is Dublin Airport WiFi safe?
- Is Zurich Airport WiFi safe?
- Is Hong Kong Airport WiFi safe?
- Is Auckland Airport WiFi safe?
- Is Atlanta Airport WiFi safe?
- Is Denver Airport WiFi safe?
- Is Seattle–Tacoma Airport WiFi safe?
- Is Miami Airport WiFi safe?
- Is Phoenix Sky Harbor WiFi safe?
- Is Orlando Airport WiFi safe?
- Is hotel WiFi safe?
- Is café WiFi safe?
- Is airplane WiFi safe?
- Is cruise ship WiFi safe?
- Is Marriott WiFi safe?
- Is Airbnb WiFi safe?
- Is Amtrak WiFi safe?
- Is Delta WiFi safe?
- Is Qantas WiFi safe?
- Hotel WiFi login page not loading on iPhone
- Hotel WiFi login page not loading on Android
- Captive portal not showing? Open the WiFi sign-in page
- Is TfL WiFi safe?
- Is Avanti West Coast WiFi safe?
- Is LNER WiFi safe?
- Is Gatwick Airport WiFi safe?
- Is Premier Inn WiFi safe?
- Is Travelodge WiFi safe?
- Is Pret WiFi safe?
- Is Wetherspoons WiFi safe?
- Is VIA Rail WiFi safe?
- Is Walmart Canada WiFi safe?
- Is Melbourne Airport WiFi safe?
- Is State Library Victoria WiFi safe?
- Is State Library of NSW WiFi safe?
- Is Xfinity WiFi safe?
- Is AT&T WiFi safe?
- Is Target WiFi safe?
- Is Southwest WiFi safe?
- Is free WiFi safe?
- Is public WiFi safe for banking?
- Public WiFi risks and dangers
- How to check if WiFi is safe
- Is hotel WiFi safe for online banking?
- How to check if your WiFi is hacked
- Is mobile data safer than WiFi?
- Is a phone hotspot safe?
- What is a captive portal?
- WiFi connected but no internet: sign in to the network
- Airport WiFi login not working
- What is an evil twin WiFi?
- Can someone see what I do on public WiFi?
- Is train WiFi safe?
- Is hospital WiFi safe?
- Is open WiFi safe?
- Is school or university WiFi safe?
- Is bus WiFi safe?
- iPhone “Weak Security” WiFi warning: what it means
- Private WiFi address: should you turn it on?
- WPA2 vs WPA3: which should you use?
- Is Wi-Fi Calling safe?
SentryFi · travel eSIM
14 guides
- Travel eSIM check: which country does your data really exit from?
- Why does my eSIM show a different country?
- eSIM data not working abroad: checklist
- eSIM vs public WiFi vs hotel WiFi: which is safer?
- Is a travel eSIM safe?
- Is Airalo safe?
- Is Holafly safe?
- Is Nomad safe?
- Is Ubigi safe?
- Is GigSky safe?
- Airalo vs Holafly: the facts side by side
- Can an eSIM be hacked?
- Is an eSIM safe for banking?
- eSIM vs SIM security: which is more secure?
SentryFi · DNS
5 guides
Untilfree · FIRE and money in time
56 guides
- What Is Your FIRE Number? Quick Calculator and Guide
- Retirement Countdown: How Many Days Until You’re Free?
- What Does It Really Cost in Hours of Your Life?
- How Much Money Do You Need to Never Work Again?
- Living Off Dividends: How Much Do You Need?
- Coast FIRE Calculator: When Can You Stop Saving for Retirement?
- How Your Savings Rate Decides When You Can Retire
- The Latte Factor: Do Small Habits Really Delay Your Freedom?
- The FIRE Movement: What It Means and Where to Start
- Lean, Chubby, Fat, Barista or Coast FIRE: Which Fits You?
- What Is My Lean FIRE Number? Meaning and Example
- Barista FIRE: How Much Do You Need Before Part-Time Work?
- Fat FIRE: How Big Is the Number and How Long Does It Take?
- Chubby FIRE: Comfortable Early Retirement Without Going Fat
- How Much Do You Need to Retire Early?
- Can You Retire at 40? A Realistic Look
- How Much Money to Retire at 50?
- How Much Money Do You Need to Quit Your Job?
- Is $500,000 Enough to Retire On, and for How Long?
- Retire With $1 Million: How Many Years Will It Last?
- How Many Years Does It Take to Save Your First $100K?
- How Many Years Until You Are a Millionaire?
- What Must You Invest to Get $1,000 a Month in Dividends?
- How Much Dividend Income Does Your Portfolio Generate?
- A Retirement Countdown App: What to Look For
- Retirement Countdown Ideas That Make the Wait Fun
- Your True Hourly Wage: What Is Your Time Really Worth?
- Financial Independence Apps: A Buyer’s Checklist
- Best FIRE Calculator Apps in 2026: An Honest Comparison
- Retire at 55: Rules, Numbers and the Gap Years
- How Much to Save to Retire in 10 Years
- How Long Will My Savings Last?
- Is $2 Million Enough to Retire? How Long It Lasts
- The 4% Rule, Explained Without the Hype
- Safe Withdrawal Rate for a Long Early Retirement
- The Rule of 72: How Long Until Your Money Doubles
- Retiring Early in the UK: ISAs, Pensions and the Gap
- Retiring Early in Australia: Super and the Bridge to 60
- How Much Do You Need to Make $500 a Month in Dividends?
- What Your Subscriptions Cost per Year, in Days
- What a Pack a Day Costs in a Year, and Over Time
- Teacher Retirement Countdown: How Many School Days Left?
- How Many Hours of Work Does an iPhone 17 Cost?
- How Many Hours of Work Are AirPods Pro?
- How Many Hours of Work Does a PS5 Cost?
- How Many Hours of Work Is a New Car?
- How Many Hours of Work Is a Used Car?
- How Many Hours of Work Is a Wedding?
- How Many Hours of Work Is a House Down Payment?
- How Many Hours of Work Does Your Rent Take?
- How Many Hours of Work Is a Year of Netflix?
- How Many Hours of Work Is a Year of College?
- Debt-Free Date Calculator: When Is Your Last Payment?
- How Long Will It Take to Pay Off Your Credit Card?
- Debt Snowball vs Avalanche: Which Is Better?
- How Long Does It Take to Pay Off Student Loans?
Whyworld · world news and trends
9 guides
- What Each Country Is Searching Today
- Ground News Alternatives, Compared Fairly
- Is There a Truly Unbiased News App?
- How Do Other Countries See the United States?
- Whyworld vs Ground News
- Is There a Google Trends App?
- What Is the World Searching for Today?
- Why Is It Trending? How to Find Out
- AllSides vs Ground News